Looking at its tranquil location in farmland near Brecon today, you’d never guess that Gaer was once one of the Romans’ largest inland forts and a vital link in the occupiers’ defensive network in Wales. Founded around AD 75, it was situated in a strategic position at the meeting point of two major roads and manned by highly trained legionaries of the Vettonian Spanish Cavalry Regiment.
In Roman times this was a busy site, with a large guardhouse, granary and heated bathhouse. Today you can see remains of a number of defensive towers, alongside two large gateways with walls standing 8ft/2.4m high in places.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.